title: Microsecond fiber laser pumped, single-frequency optical parametric oscillator for trace gas detection.
abstract: We report on the first microsecond doubly resonant optical parametric oscillator (OPO). It is based on a nested cavity OPO architecture allowing single longitudinal mode operation and low oscillation threshold (few microjoule). The combination with a master oscillator-power amplifier fiber pump laser provides a versatile optical source widely tunable in the 3.3-3.5 μm range with an adjustable pulse repetition rate (from 40 to 100 kHz), high duty cycle (~10(-2)) and mean power (up to 25 mW in the idler beam). The potential for trace gas sensing applications is demonstrated through photoacoustic detection of atmospheric methane.
authors.affiliation: ONERA, the French Aerospace Lab, Chemin de la Hunière, 91761 Palaiseau, France.
authors.forename: Jessica Barrientos
authors.initials: JB
authors.lastname: Barria
authors.forename: Sophie
authors.initials: S
authors.lastname: Roux
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Dherbecourt
authors.forename: Myriam
authors.initials: M
authors.lastname: Raybaut
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Melkonian
authors.forename: Antoine
authors.initials: A
authors.lastname: Godard
authors.forename: Michel
authors.initials: M
authors.lastname: Lefebvre